Refrigeration system oil returning control method and device

A refrigeration system and oil return control technology, which is applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., and can solve problems such as the accumulation of frozen oil at the end

Inactive Publication Date: 2018-05-04
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0005] An embodiment of the present invention provides a method for controlling oil return in a refrigeration system to solve the problem of system refrigeration oil accumulation at the end. The method includes:

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  • Refrigeration system oil returning control method and device
  • Refrigeration system oil returning control method and device
  • Refrigeration system oil returning control method and device

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0046] In this example, a refrigeration system oil return control method is provided, such as figure 1 As shown, the following steps may be included:

[0047] Step 101: Determine whether the refrigeration system needs to enter the oil return state;

[0048] Step 102: When it is determined that it is necessary to enter the oil return state, successively open the ends of the preset number of cold storages in the refrigeration system for oil return, and control the refrigeration hosts in the refrigeration system to operate at a preset capacity load, wherein , the preset capacity load matches the...

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Abstract

The invention provides a refrigeration system oil returning control method and device. The method comprises the steps of determining whether a refrigeration system needs to enter in the oil returningstate or not; under the condition that it is determined that the refrigeration system needs to enter in the oil returning state, successively opening tail ends of refrigeration houses, with the presetnumber, in the refrigeration system for oil returning, and controlling a refrigeration host in the refrigeration system to run with the preset capacity load, wherein the preset capacity load is matched with the preset number. The problem that oil exists in the tail end of an existing refrigeration system is solved, and reliability of running of the refrigeration system is effectively improved.

Description

technical field [0001] The invention relates to the technical field of equipment control, in particular to a method and device for controlling oil return in a refrigeration system. Background technique [0002] Due to the change of the cold storage load, the adjustment of the capacity of the refrigeration unit also changes accordingly. The operation of the partial capacity of the refrigeration host can be called the partial load operation of the refrigeration unit. [0003] Large-scale cold storage units rarely operate at full load, and generally operate at part load for a long time. However, during partial load operation, the suction flow rate is low, which will cause the problem that the refrigerating oil cannot return to the refrigeration host. In addition, due to the design of the system or the unit, if there is a little carelessness in the separation of oil and gas, it will cause the refrigeration oil to slowly accumulate to the end during the cycle. [0004] As for h...

Claims

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Application Information

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IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/022
Inventor 练浩民何汝龙安亚洲周巍
Owner GREE ELECTRIC APPLIANCES INC
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